WI LEAD RISK ASSESSOR EXAM 2025
QUESTIONS AND ANSWERS
EPA and WI DHS Lead Based Paint Definition - ANS ≥0.5%
≥1.0 mg/cm2
Nationally houses built before 1978_______ have lead based pain - ANS 75%
XRF - ANS X-ray fluorescence
Factors that should be considered for XRF: - ANS - Substrate Correction
- inconclusive range
- measuring K & L shell reading
What year was lead based paint banned? - ANS 1978
Only _______ areas that are in the scope of work from the contractor - ANS testing areas
Sampling requirements for Inside a home - ANS Visual inspection
Less than 4 rooms = sampling all rooms
More than 4 rooms = minimum of four rooms sampled
Each room should have sampled: Floor Alternate between the tough and window sill
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,_______% confident for room amount with big complexes, with lots of rooms - ANS 95%
Wait how long after any cleanup has been done - ANS an hour
Sampling requirements for outside a home - ANS -Have to do a visual inspection.
-Doesn't specify dust wipe sampling outside
-No requirements to have porch floor dust wiped - HUD requires it for particular projects so it is
expected to be done
-Soil Samples
Sampling requirements for soil samples (and max levels) - ANS 3-10 composite samples in
drip line
400 ppm is the threshold for children areas
1200 ppm for all other areas
HUD paint chip recommended size - ANS Recommended HUD paint chip size is 2" X 2"
What type of investigations can Lead risk assessor do - ANS - clearances
- full inspection
- lead partial inspection
- lead-free inspections
- EBL
- Hazard Screening
- Lead-safe Investigations
How often should a leak/wipe test be done, and why? - ANS every 6 months - this checks to
see if there are leaks in the radioactive source shield
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, How often should you calibrate the XRF machine? - ANS At the beginning, every fours, and at
the end
NIST - ANS (National Institute of Standards and Technology)
Set the SRM
Performance Characteristic Sheet (PCS) - ANS Provides important information on how to use
the specific XRF
SRM - ANS (Standard Reference Material) closest to 1.0 mg/cm2 and used to calibrate the
machine
Should have calibration range (first and second reading) between 0.8 - 1.2 mg/cm2 (+/- 0.2
mg/cm2) for Heuresis model. Each model is different. If out of range then should not use the
samples taken.
substrate bias/correction - ANS what's below the paint
Newer machines do not need to substrate correction
Take apparent lead concentration (APL) - substrate equivalent lead (SEL) = corrected lead
concentration
APL - SEL = corrected lead concentration
Older machines would have inconclusive ranges for certain substrates (in PCS). If your sample
falls in between the inconclusive range then you will have to take a paint chip sample, or
assume it is lead paint.
6 substrates - ANS Brick, concrete, drywall, metal, plaster, and wood
What is Badge/Ring/badge? How often send to lab? What type of exposure does it measure? -
ANS Warn to measure radiation exposure.
3 Copyright ©2025 THESTAR ALL RIGHTS RESERVED
QUESTIONS AND ANSWERS
EPA and WI DHS Lead Based Paint Definition - ANS ≥0.5%
≥1.0 mg/cm2
Nationally houses built before 1978_______ have lead based pain - ANS 75%
XRF - ANS X-ray fluorescence
Factors that should be considered for XRF: - ANS - Substrate Correction
- inconclusive range
- measuring K & L shell reading
What year was lead based paint banned? - ANS 1978
Only _______ areas that are in the scope of work from the contractor - ANS testing areas
Sampling requirements for Inside a home - ANS Visual inspection
Less than 4 rooms = sampling all rooms
More than 4 rooms = minimum of four rooms sampled
Each room should have sampled: Floor Alternate between the tough and window sill
1 Copyright ©2025 THESTAR ALL RIGHTS RESERVED
,_______% confident for room amount with big complexes, with lots of rooms - ANS 95%
Wait how long after any cleanup has been done - ANS an hour
Sampling requirements for outside a home - ANS -Have to do a visual inspection.
-Doesn't specify dust wipe sampling outside
-No requirements to have porch floor dust wiped - HUD requires it for particular projects so it is
expected to be done
-Soil Samples
Sampling requirements for soil samples (and max levels) - ANS 3-10 composite samples in
drip line
400 ppm is the threshold for children areas
1200 ppm for all other areas
HUD paint chip recommended size - ANS Recommended HUD paint chip size is 2" X 2"
What type of investigations can Lead risk assessor do - ANS - clearances
- full inspection
- lead partial inspection
- lead-free inspections
- EBL
- Hazard Screening
- Lead-safe Investigations
How often should a leak/wipe test be done, and why? - ANS every 6 months - this checks to
see if there are leaks in the radioactive source shield
2 Copyright ©2025 THESTAR ALL RIGHTS RESERVED
, How often should you calibrate the XRF machine? - ANS At the beginning, every fours, and at
the end
NIST - ANS (National Institute of Standards and Technology)
Set the SRM
Performance Characteristic Sheet (PCS) - ANS Provides important information on how to use
the specific XRF
SRM - ANS (Standard Reference Material) closest to 1.0 mg/cm2 and used to calibrate the
machine
Should have calibration range (first and second reading) between 0.8 - 1.2 mg/cm2 (+/- 0.2
mg/cm2) for Heuresis model. Each model is different. If out of range then should not use the
samples taken.
substrate bias/correction - ANS what's below the paint
Newer machines do not need to substrate correction
Take apparent lead concentration (APL) - substrate equivalent lead (SEL) = corrected lead
concentration
APL - SEL = corrected lead concentration
Older machines would have inconclusive ranges for certain substrates (in PCS). If your sample
falls in between the inconclusive range then you will have to take a paint chip sample, or
assume it is lead paint.
6 substrates - ANS Brick, concrete, drywall, metal, plaster, and wood
What is Badge/Ring/badge? How often send to lab? What type of exposure does it measure? -
ANS Warn to measure radiation exposure.
3 Copyright ©2025 THESTAR ALL RIGHTS RESERVED
